Nut-lock.



G. ZOLL. NUT LUCK.

APPLICATION PLED AUG. 24, 1908.

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Witwe/ awo y n @gl/1% mi, Md n l aum- UNITED STATES PATENT OFFICE. i

' eEoRGEzoLL, 0F FAYE'rfiEVILLE, TEXAS.

NUT-Lock.-

Specviication of Letters Patent. i Application ma Amen, isos, `ini-m1No. 450,004.

Toall whomtt may concern:

Be it'knownv that I, GEORGE ZOLL', citizen ofthe United States,residingl at Fayetteville, 'in 'the county of Fayette and State ofTexas, have invented certain new and useful In`1provenientsV inNut-Locks, of which the p following is a specification.

This invention relates to nut-locks, and particularly comprises animprovement in nutlocks of that class in which-two. nuts are used, thebolt Ihaving opposite threads, on different sections thereof, with'onenut fitting on onel thread and another nut fittin onf-the other thread,the nuts beingl fasten together by bending down a projection on thelatter against the side of the former, said projection 0iprojectionsbeing so constructed that they can be bent or sprungout. again to permitthe' nuts to be released, without mutilating the bolt andnwithoutrendering Athev nuts useless.

'lhe invention 1s illustrated in the accompanying drawings in which-`Figure l is a side View of the complete' device; Fig. 2 is'an end View;Fig. .3 isa side View of the bolt.

Referring s ecifcally to the drawings, 6 indicates-.the bolt havingthreads 7 and 8 eilt 1n respectively opposite directions, the

latter threads being on a reduced part of thev bolt.- A l The inner orordinary mit is indicated at. 9, and ts on the thread 7, The outer orlock nut is indicated at 10, and fits on the thread 8. This latter nutis provided at opposite sides with extensions or wings 11.

which are 'flexible and which extend from the sides ofthe nut adjacentAto the inner 'face thereof, the extensions being comparatively thinwith respect to the axis of the nut, and broad laterally, the widthbeing conveniently equal `to the width `of the side face of the nut.This .construction enables the wings to be bent in or around in substan`tially circular form, as clearly shown in rtencea Dec. 22, ieee. Q

e turned by special effort, .i i'

moved, and afterwards the inner nut. And l .the nuts can be replacedand' used again in similar manner. l The invention will be found veryeffective for tlie intended purpose and the lock will be particularlyuseful forlocking the nuts ou the bolts connectin of railways, where thenee of an effective nut lock, which, nevertheless, can be released wliendesired, is especially great.4

I claim: V

l1. In a nut-lock, the combination of a bolt having inner and outeropposite threads, and

the fish plates y a nut on each thread, the outer nut having a wingprojecting therefrom and curved to substantially circular form tocontact with the side of the yinner nut, the curvature of the wingpermitting it to yield and slip over the corners of the inner nut on theapplication of special force. 2. In a nut-lock, the combination of abolt having inner and outer opposite threads ,and i a nut on eachthread', the outer nut having a/ wing projecting therefrom andv curvedto substantially circular .form to contact with jtheside of the innernut, the wing being comparatively thin and curled inwardly against theside of the inner nut, whereby it will yield for the purpose stated. I

In testimony whereof, I-aix my signature in presence of two witnesses. u

GEORGE ZOLL.

Witnesses: V f

CONRAD Beursen,

CHAns. J. KLiMrcx-m.

